Mandrel de-corer



'Dea 22, 1931. G, 5T PETER 1,838,011

MANDREL DECURER Filed May 4, 1951 3 Sheets-Sheet 1 hi L; @woe nto@ bww6207?@ LS'jPeZer a@ f f Y@ Dec. 22, 1931. Q sTi PETER 1,838,011

MANDREL DECORER Patented Dec. 22, 1931 UNITED STATES GEORGE sT. PETER,or BANGOR, ivrAlNiiiv MANDREL IDE-COREE Application led May 4, 1931.

The invention relates to a machine for removing remnants or cores ofnewsprint or other paper from mandrels upon which rolls of such paperare handled by printing presses or other machines. The paper at thecenters of the rolls, is not useable in the machines and must be removedbefore theinandrels can again be used, and at present, slow, laboriousand dangerous hand-operations are employed tovcut the cores of paperfrom themandrels. My invention however, aims to provide a rapid andeiiicient machine for removing the cores, without danger to theoperator. With the above object in view, the invention resides in thenovel subject matter hereH inafter described and claimed, descriptionbeing accomplished by reference to the accompanying drawings. y no Fig.1 is a. perspective view of machine t' constructed in accordance withthe invention.

Fig. 2 is a fragmentary side elevation partly broken away and insection.

Fig. 3 is a horizontal sectional LView on y line 3 3 of Fig. 2. e D Fig.4 is a vertical transverse sectional view on line 4 4 of Fig. 2.

Fig. 5 is a fragmentary vertical section on line 5 5 of`Fig.-4.` 1

Fig. 6 is a side elevation of the knife-carrying carriage and associatedparts, and this view illustrates the manner in which the machine cutsthe paper core when the carriage is moved in one direction. y Fig. 7 isan enlarged fragmentary elevation partly in section, showing the mannerin which the remaining layers of the paper core are cut when thecarriage is moved in `tlieopposite direction.

Fig. 8 is a detail sectional view on line 8 8 of Fig. 7'. n, `f

9 and 10 are Ahorizontal sectional views on lines 9 9 and 10 10 of Fig.7. n' A. preferred construction has been `illustrated and will bespecifically described,with the understanding however that within thescope of the invention as claimed, variations may be made.

The frame strcture F of the machine emv bodies two end frames E whichare substantial duplicates. Each of these end members Serial No.535,001.

connected by a transverse bar 14 carrying a f support 15 for an electricmotor 16 which is used for. propelling the knife-carrying carriage 17 ineither direction. This carriage is slidable along a horizontal guidewaypreferably consisting of parallel rods 18 extending between theupperends of the standards 12 and rigidly secured to the latter.' Ahorizontal feed screw 19 is provided for the carriage 17, said screwhaving a threaded engagement with said carriage and having its endsrotatably mounted upon the standards 12. At one of its ends,the feedscrew 19 is provided with a reverse gear 2O controlled by a lever 21 orin some other preferred manner,

for driving the screw 19 in either direction. -f

A vertical shaft 22 is provided to drive the reverse gear 20, said shaft22 being driven by the motor 16, thro-ugh the instrumentality ofappropriate gearing 23. 24 merely denotes a bearing bracket for theshaft 22, said;

by means of a hand screw 26, the lower end of said slide being-providedwith one knife 27 which cuts through the greater part of themandrel-carried paper core 28, when the carriage 17 m'oves in onedirection, said carriage also having another knife 29 whichcuts throughthe remaining layers of the core upon the return movement of thecarriage,

leaving the mandrel 30 free of paper. rlhe action of the knives 27 and29 is illustrated more particularly in Figs. 1, 6 and 7 and will behereinafter more definitely explained.

In the present showing, the lower end of the slide 25 is provided with akerf 31 vin which the upper portions of both knives 27 and 29 arereceived, but.l separate recesses could'of course be provided for saidAknives. The knife 27 is of substantially L-shape and is provided with acutting edge 32 inclined throughout its length away from the knife 29.

The vertical portion of'this blade 27 Vis. i,

extending across the kerf 31, said slot also receiving a fastener 35extending across said kerf. When this fastener is tightened, the kerf 31is transversely narrowed and hence the knife 27 is tightly clamped inplace, and the key 34 merely prevents said knife from rocking about thefastener 35.

The blader`29 is verticallyelongated and 'is provided with a verticalcutting edge 36 facing away from the knife 27. This knife 29 is providedwith a blunt-lowerfend 37 and with an acute angular nose 38 at thejuncture of the edges'36 and 37. The upper end ofthe knife 29 is formedwith a verticalV slot 39 throughwhich a pivot 40 passes, said 'pivotbeing carried by the slide ,25, Knife 29 projects some distance abovethe pivot 40 `and is received in the lower end of a coiled compressionspring ;41,which is seated in aA notch 42 in the Yslide 25, the upperend of said notch being provided with a stud 43 or equivalent means forholding the upper end of the spring in place. The knife 29 may swingaway from Vthe cutter 27, without limit during the operation of themachine, vbut its swinging movement toward said knife 27 is limited by astop pin 44 which is carried by the slide 25 Vand vextends across thekerf 31.

lVhen the carriage 17 is traveling in the direction indicated by thetarrows A of Figs. 1 and 6, the knife 27 cuts through the greater partof the thickness of the paper corer28, the knife 29 then trailing idlyin fan` outwardly swung position.l as clearlyshown in Figs. 1 and 6.When the carriage 17 is reversed however, thelknife 29 (immediatelyswings inwardly to the extent allowed by the pin 44, with the resultthat saidknife 29 then occup'iesran operative position (Fig. 7) so thatit willcut the remaining layers of paper from the mandrel during thereturn movement of the carriage. During its operation, the knife 29slides at its lower end 87, along the mandrel 30 and if any irregulari-.ties in this mandrel necessitate that lthe -knife shall movevertically, such movement -is allowed by the spring 41, said springalways serving to holdthe knife tightly down against the mandrel. Byemploying the two knives 27 and 29 operating in or substantially in themanner shownand described, the paper maybemuch more cleanly cut from themandrel than when attempting to use only one knife to .completely cutthrough the core, for if a knife such as 27 for instance, were used, inorder to adjust saidknife so thatits lieelwould cut entirely through thecore, there would `be' danger Vef said heel dragging uponsaidcore andhence seriously dulling the `knife Aso that-said heel would tea-r theypaper instead of cuttingrit and would soon become so obstructed as tobe utterly inefficient. There is no such danger however,

5 with the 'knife 29, for only'its blunt edge 37 `Aengages the mandrel80. f

To support the mandrel 30, I provide two centering plugs for receptionin the ends of said mandrel, one of these plugs being shown at 45 inFig. 1 while the other is illustrated at 46 in Figs. 2 and 3; One ofthese plugs is provided with a. suitable lug or the like 47 receivablein a mandrel notch, to hold the mandrel against rotation. Both plugs 45and 46 are provided with carrying shanks such as 48 (Figs. 1 and 3). vThe shank 48 of the plug 46 is secured to a slide 49 which may beadjusted to various positions along two horizontal guide rods 50 whichextend between the end frames E, the ends of said rods being suitablysecured to horizontal angle iron bars 51 which cross the standards 12and are adjustably connected with the latter. The shank of the plug 45passes through a vertical slot 52 in the standard 12 remote from thecarri-age 49 and is secured to the adjacent bar 51. By verticallyadjusting the bars 51, the `mandrel supporting means may be sopositioned that the surface -of the mandrel will be absolutely parallelwith the carriage guides 18, so that the knives 27 and 29 may operate inproper relation with said mandrel. By moving the slide 49 away-from theplug 45, a mandrel whose core has been cut, may be easily removed fromthe machine, and to insert another mandrel, one end of the latteris'engaged with the plug 45 and the slide 49 is then slidfalon-gthe rods50 until its plug 46 is properly engaged with the other end of saidmandrel. If desired, suitable locking means may be employed for lockingthe slide 49 in any position to which it has been adjusted;

For securing the bars 51 to the standards 12 and allowingr verticaladjustment of said bars, I have shown bolts 53 passing through openingsin said bars and through slots 54 in said standards. Jack screws 55 arepreferably mounted under these bars 51 to allow easy and accuratevertical adjustment of them when the bolts 5 are loosened, and when saidbolts are tightened, the entire mandrel-supporting means will be rigidlyheld.

In operating the machine, the screw 26 is operated to raise the slide 25so that the blades 27 and 29 will be entirely outof the Y,way whenplacing the core-carrying mandrel in the machine. One end of the mandrelis engaged with the plug 45, the slide 49 is then slidinwardly until itsplug 46 will properly engage the other end of the mandrel, and saidslide is then locked if locking means be ,provided for it. The screw 27is now operatedv to lower the slide 25's() that the knife 27 will cutalmost entirely through the core 28 during its travel in the directionA, and the screw 19 is then driven in the proper direction to eect suchcarriage travel. As the'knife 27 operates to cut most of the way throughthe core 28 (Figs. 1 and 6), the knife CTI 29 merely trails idly in thebottoni of the cut, as shown in these views. When the carriage 17 isreversed however, the knife 29 moves to the operative position shown inFig. 7 and cuts through the remaining layers of the core. Hence,movement of the carriage first in one direction and then in the other,effects complete cutting of the paper core from the mandrel and leavesthe carriage at the proper end of the machine Vfor starting anothercore-removing operation.

The general structure shown and described has proven to be desirablefrom numerous standpoints and is therefore preferably followed. However,within the scope of the invention as claimed, variations may be made, asabove stated.

I claim l. A machine for cutting a tubular core from a mandrel,comprising a frame, a carriage guideway carried by said frame, t-wosupports for the ends of a mandrel, said supports being carried by saidframe and mounted for relative shifting according to the length of themandrel, said supports being positioned to support said mandrel inparallel relation with said guideway, a carriage movable along saidguideway, a cutter mounted on said carriage forcutting the core, andmeans for moving said carriage along said guideway.

2. A machine for cutting a tubular core from a mandrel, comprising tworigid end members, two parallel rods extending between said end membersand secured thereto,

a mandrel-engaging supporting member mounted between said rods at oneend of the latter and adapted to engage one end of a core-carrying;mandrel, a slide adjustable along the other ends of said rods, a secondmandrel-engaging supporting member fixedly carried by said slide andadapted to en gage the other end of the mandrel, and

A means for cutting the core from the mandrel while held by saidsupporting members.

3. A machine for cutting a tubular core from .a mandrel, comprising tworigid end members, carriage guiding meansl extending between said endmembers, a carriage movable along said guiding means and having a knifefor cutting the core, two supporting members for engagement with theends of the core-carrying mandrel to hold the latter in position forcutting of the core with said knife, a slide carrying one of saidsupporting members, two parallel rods along which said slide is movable,said rods being disposed at opposite sides of said supporting membersand parallel with said carriagel guiding means, two transverse bars towhich the ends of said rods are secured, the other of said supportingmembers being carried by one of said bars, and adjustable means securingsaid bars to said end members and allowing'adjustment of said bars androds toward and from said carriage.

t. A machine for cutting a tubular core from a mandrel, comprising aframe, -a carriage guideway carried by said frame, a carriage and meansfor moving it along said guideway, means for supporting the corecarryingmandrel in parallel relation with said carriage guideway, one knifemounted on said carriage for cutting most of the core thickness as thecarriage travels in one direction, a second knife for cutting theremaining thickness of the core as the carriage travels in the otherdirection, and means movably mounting said second knife on said carriagefor allowing said `second knife to move idly when the carriage travelsin said one direction and for allowing said second knife to move tooperative position when said carriage travels in the other direction.

5. A. machine for cutting a tubular core from -a mandrel, comprising aframe, a carriage guideway carried by said frame, a carriage Iand meansfor moving it along said guideway, means for supporting the corecarryingmandrel in parallel relation with said carriage guideway, one knifemounted on said carriage for cutting most of the core thickness as thecarriage travels in one direction, a secon-d knife for cutting theremaining thickness of the core as the carriage travels in the otherdirection, said second knife having a cutting edge at an angle to theline along which the carriage moves, and means pivotally mounting saidsecond knife on said carriage upon an axis transverse to the lineof'movement of said carriage, whereby said second knife may swing to anidle trailing position when the carriage moves in said one direction andmay swing to operative position when the carriage moves in the otherdirection, said carriage having a stop for limiting the last mentionedswinging movement of said second knife.

6. A structure as specified in claim 4; together with spring means o nthe carriage for pressing said second knife against the mandrel while inoperation, saidV second knife having a blunt portion independent of itscutting edge adapted to slide Ialong said mandrel.

7. A structure as specified in claim 5, said pivotal mounting means forsaid second knife embodying means allowing shifting of said second knifetransversely of the line of carriage movement, and spring means actingon said second knife for pressing the latter against the mandrel when inoperation, said second knife having a blunt edge independent of itscutting edge adapted to slide along GEORGE ST. PETER.

